Door



E. KOMENDA DOOR oer; 26, 1943.

Filed Feb. 11, 1939 door;

Patented Oct. 26,, 1943 UNITED STATES PATENT OFFICE DOOR Erwin Komenda, Stuttgart-Korntal, Germany; vested in the Alien Property Custodian Application February 11, 1939, Serial No. 255,841

. In Germany February 16, 1938 5Claims. (c1. est- 44) metal door, the inside wall of which may be fabricated with a minimum of expense and waste.

Another object of this invention is the provision of a door, the inside wall of which is formedv from a plurality of easily and cheaply produced sheet metal parts.

Still another object of this invention is the provision of a door, the inside wall of which is formed from a plurality of readily assembled sheet metal parts.

g A further object of this invention is to provide a sheet metal'door, the inside wall of which is I subjected to the greatest stress.

A morespecific object of this invention is to provide a door, the insidewall of which is formed from a plurality of overlapping sheetm'etal-members. f I f l Further objects andadvantages of the invention will be apparent from a study of the appended claimsandof the description, taken in connection with the attached drawing, wherein: Fig. 1 is a vertical cross-sectional viewof the improveddoor construction taken along a plane lying betweenthe outside and inside walls of the Fig. 2 is a horizontal cross-sectional view taken along the line IIII of Fig. 1;'

Fig. 3 is a partial cross-sectional View, similar shown in Fig. 1.

As will be readily seen from aastudy of Fig. l, the inside wall of the door is provided with the usual cwindow opening I, surrounded by sheet metal panel 2, forming the upper inside door face. The panel 2 i's provided with downwardly extend ing projections 3 and 4 at opposite ends of the door, which are adapted to be overlapped by respective vertical door frame borders 5 and 6 The vertical door frame borders 5 and 6 are respectively. extended to form bottom corners I and 8 for the door interior. A lower door frame border r 9 is overlapped at each end by the corner portions l and 8 of the vertical frame borders 5 and 6.

The lower frame border 9 is also provided with upwardly extending projections l0 and H at each end, which projections in turn, are'respectively Ill;

overlappedby the main section of the respective vertical "door frame borders 5 and 6.

is'indicated by the dotted lines in Fig. l and by the cross-sectional view in Fig. 2, the overlappingbetweenthe'projections 3 and l of the upper interior door panel 2 with the vertical door frame borders5 and 6, and the overlapping of the latter with the lower door frame border 9 takes place not only at the sides and corners, but also along the inside wall itself. In order that the desired smooth contour of interior surface be preserved, those members which are overlapped, such as the projections 3 and. A and the lowerframe border 9, are preferably inwardly displaced toan amount ubstantially equal to the thickness of the overlapping members. As a result of this arrangement, the only outward evidenceofthe overlapping will bea thin line showingthe meeting of the overlapping parts. This line may be substantially effaced by theapplication of painter lacquer, and, of course, will entirely disappear if an additional lining is applied. Theconnection of the individual sheet metal parts with one another can be brought about by any uitablewell known means, the final choice beingdependent upon the particular characteristics of themetal used. In some cases spot welding is desirable, while in other cases rivets or seam welds are more suitable.

One advantage of the proposed overlapping construction in addition to many other advantages thereof, is the fact that additional strength is provided at those portions of the inside door face which are ordinarily subjected to the greater order to facilitate connection of the hinges l2 and I3 with the doorQin the preferred construction the downwardly extending projection 3 is formed'with a pocket I l and the upwardly extending projection I0 is formed with a pocket 15. The hinges extend into the pockets and are preferably connected to the door by means of rivets extending through both sheets of the overlapped metal. In Fig. 1 these rivets are indicated by the reference numeral l6. l I

m A. vehicle door is ordinarily also subjected to extraordinary strain at the point of attachment of the door check thereto. As indicated in Fig. 1, an opening I! may be provided at the overlapping between the projection 3 and the vertical door It is likewise desirable that the door bumper be positioned at a point having considerable strength. To this end I prefer to place the door bumper 20 in a depression of that part of the vertical door frame border 6 which is overlapped by the upwardly extending projection ll of the" lower door frame border 9.

wall including a sheet metal panel forming the upper portion of said inside wall, provided with a pair of downwardly extending projections, a pair of vertical door frame borders, one at each end of said door, overlapping with said respective projections, a bottom door frame border interconnecting and overlapping with the lower ends of said vertical frame border, a door checking device, and means for attaching said door checking device at the section of overlapping of one of said sheet metal panel projections with one of said vertical door frame borders.

2. In a door having inside and outside walls,

the combination of means forming said inside wall including a sheet metal panel forming the upper portion of said inside wall, provided with a'pair of downwardly extending projections, a

1 The construction illustrated in Fig. 3 is simi- I lar to that shown in Fig. 1 except that in this case the vertical door frameborder B is overlappedby the projection 4 of the upper sheet metal member 2 and by the lower door frame border 9. In this case-the vertical door frame borders are displaced inwardly .to an amount substantially equal to the thickness of the overlapping parts; I v I I 1 I The above-described constructions offer many advantages over those previously used in the prior art; Itis realized that constructions are known wherein a door frame is formed from individual sheetmetal strips which is thencoveredby sheet metal walls. Such constructions,

however, involve the problem of .connectingthe many parts together, necessitating a considerable expense of time, Furthermore, the parts must be very accurately; dimensioned and even then much supplemental; work and waste occurs be-- I cause of inaccuracyp 'I' hese disadvantages can be, avoided by constructing the inside andgoutside walls from a singlepiece of -sheet;-metal. This, however, necessitates the-use of large and expensive presses and if errors'occur, as experis 'ence -has shown they do; the waste is greater because of; the larger size of the pieces used.

In'contrast to the above, by using-relatively small sheet metal parts, as in vapplicants construction, fabrication is accomplished through the use of relatively light and inexpensivemachinery. By overlapping these parts at suitable places, the complete construction worm-,

relatively stronger; at those points where .the heaviest strain occurs. {The overlappingarrange ment also results in an ease in assembling the parts ofthe door in that the various parts are in effect automatically guided relatively to one another. I V s It willbe obvious to those skilled'in this art that the principles of my construction are aption illustrated, but only as may be required by the claims which follow:

' 1. In a door having inside and outside walls, the combination of means forming said inside pair of vertical door frame borders, one at each end of said door, overlapping with said respective projections, a bottom door frame border,

inter-connecting and overlapping with the lower ends of said vertical frame border, a door-lock, and. means for: attaching said door look at the section of overlapping of one of said sheet metal panel projections with one of said vertical door frame borders.

3. In a ,door having inside and outside walls, the combination of means forming said inside wall including a sheet metal panel forming the upper portion of said inside wall, provided with a pair of downwardly extending projections, a pair of vertical doorframe borders, one at each end of said door, overlapping with said respec tive projections, a bottom door frame border interconnecting and overlapping with'the lower ends of said'vertical frame border, one of said door frame borders being formed with a de-- pressed portion in that part thereof overlapping with one'ofthe other doorframe borders, and

a resilient door bumper mounted in said de-- lapping door portions.

5; In a door havinginside' and outside walls, the combination 'of means forming said inside wall'including a sheet metal panel forming the upper portion of said inside wall, provided with a pair of downwardly extending projections, a

pair of vertical door frame borders,1one at, each end of said door, overlapping with. said respec'- tive projections, a :bottom doorframe border inter-connecting and overlapping with the lower ends of said vertical frame border, door supporting means extending between theoverlapped' por-' tionsof said door,'and means for rigidly attach ing said door supporting means to said overlapping door portions; Y

' .ERWIN 'KOMENDA. 

